The Pokémon VS set was the eleventh set released in Japan. This set follows on from the standards brought in Gym Heroes & Gym Challenge and features nothing but Owner's Pokémon. However, unlike those sets, these Pokémon cards were all Basic Pokémon despite whether the Pokémon in question was an evolved Pokémon or not. As such, Wizards of the Coast decided not to release this set in the United States due to the Pokémon having high HP and strong attacks, causing worry it would break the game.This set is based upon the Gym Leaders & Elite Four of Johto & Kanto from the time period that Gold & Silver is based upon. As such, it has the 15 Gym Leaders, 4 Elite Four, Champion and Team Rocket characters all have several cards under them. These Pokémon are all first and second generation Pokémon and tend to match the trainer's in-game Pokémon and Pokémon related to their signature type. This set also introduced Technical Machines into the Pokémon Card Game. These cards can be attached to Pokémon to give them an extra attack.